Internet through COAX to detached garage 350 feet away

March 11, 2019 at 08:59:49
Specs: Windows 10
This summer we build a detached garage in the process Xfinity/Comcast came out to hook up service and the Tech told me to just run COAX to my garage to extend my service out to the garage. I have buried the cable and since have found no solution to have a WIFI / Internet signal in my garage. From what I have read I probably should have just buried CAT6 cable but now I am pot committed. Please help.

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March 11, 2019 at 10:13:56
As a consolation, CAT 6 has a max length of roughly 300 feet, so burying CAT 6 would have been the wrong choice.

That said, your options depend on if that coax is attached to the Comcast network. If it is, and it probably is if it was a Comcast tech that did the job, you'll have to get a second cable modem registered to your account. If the cable terminates in your house, you could get a pair of ethernet over coax adapters. You'll still have to worry about getting ethernet to the cable's house end and a WiFi bridge for the cable's garage, so I hope your garage is powered.

Alternatively, you could ignore the cable and go with a pair of directional WiFi antennas with their associated hardware.

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March 11, 2019 at 10:32:52
The comcast tech would not run the coax because there wasn't a TV to hook up at the time. I ran a coax from the outside splitter out to the garage which does have power. So other than paying comcast for another cable modem to register to my account there is no way to use the coax? I was looking at ethernet over coax just haven't figured out how I would get a ethernet cable from my existing modem over to where the splitter is located outside of the house. So if I figure that out then I just have to add a wireless router in the garage to be able broadcast a signal?

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March 11, 2019 at 11:03:29
You can get ethernet to your cable the same way you can get WiFi in your garage. With a WiFi bridge. I've seen wireless routers that offer a WiFi bridge mode, but I couldn't give you the names of them.

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Related Solutions

March 11, 2019 at 12:22:13
If your provider is a cable (coax) service (as compared to ADSL) and they can/will provide you with another modem, and you used the same coax cable they use, you could probably get it run out to your shop through the coax. If you've pulled the same kind of cable between buildings, call your provider and ask about adding a second modem in the shop. Expect to be charged for it, but it may be as simple as plugging the modem into power and connecting the coax to it. If it's not a combination device (ie: modem/router/wireless access point all in one) then you'll need a wifi capable router to go along with the modem.

If they can't, or won't, then your simplest, least expensive solution, will likely be point-to-point wireless antenna's. Put one on each building, connect them to a router and point them at each other. This would require pulling a short length of Cat5e./6 through your walls.

Alternatively, if you can afford it, you could go with fiber optic cable. Even multi-mode cable has a long enough segment length that 350' would not be an issue. Sadly, 350' is too long for a Cat6 cable.

Fiber optic cable itself has gotten a lot more reasonably priced over the years but the optics are still expensive.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***

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March 11, 2019 at 13:52:05
If you're over the accepted 300 feet between house/garage then your options are a little limited.

The direction wifi antennae approach is one to consider... However... and a long shot at that... if the garage power is on the same power system as the house; i.e. on the same control panel/cct breakers etc. then possibly - and it's possibly... - homeplugs may work.

You might get a couple from say Amazon to ryr out; and if they work then fine... If they don't you can return them as not suitable... -One advantage of the Amazon system at least?

Which bands to use in USA?Canada I'm not sure. I'm in the UK at present and only use Devolo - the first in the field; and for my money the best there is. Unfortunately they're not available in N. America.

Homeplug (aka Powerline) system use house wiring as a lan network.

will tell you more about the system.

They allow modules for ethernet and wifi; and you can feed/link the main router via homeplugs /powerline adapters to a remote router and set that up as wifi (and of course ethernet).

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March 11, 2019 at 15:43:55
If you disconnect the coax cable from their splitter you can use a waterproof inline connector and run a short coax line into the house and then to the ethernet to coax adapter. Aside from running the line through the wall it is the simplest except possibly the powerline adapter (Homeplug in UK) but that needs outbuilding to be on same internal power panel as the rest of the house.

You have to be a little bit crazy to keep you from going insane.

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